Table Of Contents - A.O. Smith 101 Series Instruction Manual

SAFE iNSTALLATiON, USE AND SErViCE.......................................... 3
GENErAL SAFETy iNFOrmATiON ...................................................... 4
Precautions ........................................................................................ 4
iNTrODUCTiON .................................................................................... 6
Qualifications ..................................................................................... 6
iCOmm™ & BACnet Compatible ....................................................... 6
Preparing For The installation ........................................................... 6
FEATUrES AND COmPONENTS ......................................................... 7
Basic Operation ................................................................................. 7
Top View ............................................................................................ 8
Side Views ......................................................................................... 9
iNSTALLATiON CONSiDErATiONS ................................................... 10
Rough In Dimensions ...................................................................... 10
recovery Capacities ........................................................................ 10
Locating The Water Heater ...............................................................11
Clearance To Combustible materials ........................................................ 11
Service Clearance ....................................................................................11
Insulation blankets .......................................................................... 12
INSTALLATIoN REqUIREmENTS ...................................................... 13
Gas Pressure Requirements ........................................................... 13
Supply Gas Line .............................................................................. 13
Supply Gas Regulator ..................................................................... 13
Power Supply .................................................................................. 13
mixing Valves ................................................................................... 14
Dishwashing machines .................................................................... 14
Closed Water Systems .................................................................... 14
Thermal Expansion .......................................................................... 14
Temperature-Pressure Relief Valve ................................................. 15
Condensate Drain ............................................................................ 16
Air Requirements ............................................................................. 17
Commonwealth of massachusetts ................................................... 20
VENTING INSTALLATIoN ................................................................... 21
General Venting Information ............................................................ 21
Category iV Appliance ..............................................................................21
Power Vent Configuration .........................................................................21
Direct Vent Configuration ..........................................................................21
General Venting instructions ........................................................... 21
Venting Requirements ..................................................................... 22
maximum Equivalent Lengths ..................................................................22
minimum Equivalent Lengths ...................................................................22
maximum Number Of Elbows ...................................................................22
Venting installation Sequence ......................................................... 23
Power Vent installation .................................................................... 23
Direct Vent installation ..................................................................... 23
Vertical Termination installation ....................................................... 24
Sidewall Termination installation...................................................... 26
Concentric Termination installation .................................................. 27
multiple Concentric Termination Clearances ...........................................30
multiple Concentric Termination Arrangements ........................................31
Venting Arrangements ..................................................................... 32
Termination Clearances Sidewall Power Vent ................................. 34
Termination Clearances Sidewall Direct Vent .................................. 35
WATER HEATER INSTALLATIoN ........................................................ 36
Condensate Drain installation ......................................................... 36

taBle of contents

Supply Gas Line Installation ............................................................ 37
Supply Gas Regulator Installation ................................................... 38
Electrical Wiring ............................................................................... 39
Water Line Connections .................................................................. 40
T&P Valve Discharge Pipe ............................................................... 40
TEmPERATURE REGULATIoN .......................................................... 41
High Temperature Limit Control (ECO) ............................................ 41
Thermostat Control .......................................................................... 41
CONTrOL SySTEm OPErATiON ...................................................... 42
Control System Navigation .............................................................. 42
User Settings & Control System menus .......................................... 45
START UP ............................................................................................ 50
Initial Start Up .................................................................................. 50
Checking The Firing rate ................................................................ 52
High Altitude installations ................................................................ 52
LIGHTING THE WATER HEATER ....................................................... 53
Lighting & operation Label .............................................................. 53
TRoUbLESHooTING ......................................................................... 54
installation Checklist ........................................................................ 54
Sequence Of Operation ................................................................... 54
Sequence Of Operation Flow Chart ................................................ 55
operational Problems ...................................................................... 56
Fault And Alert Conditions ............................................................... 57
mAiNTENANCE ................................................................................... 60
maintenance Schedule .................................................................... 60
DIAGRAmS .......................................................................................... 63
CCB - Central Control Board Layout ............................................... 63
bTH 300 Wiring Diagram ................................................................. 64
BTH 400, 500 Wiring Diagram ......................................................... 65
Circulation Pump Wiring Diagrams .................................................. 66
Water Piping Diagrams .................................................................... 67
LimiTED WArrANTy .......................................................................... 74
2
Power Supply Connections ......................................................................39
Enable/Disable Circuit ..............................................................................39
The Desktop Screen .................................................................................42
Status icons ..............................................................................................43
Temperatures menu ..................................................................................45
Heater Status menu ..................................................................................46
Display Settings ........................................................................................47
Heater Information ....................................................................................47
Current Fault .............................................................................................48
Fault History .............................................................................................48
Fault Occurrence ......................................................................................48
restore Factory Defaults ..........................................................................48
Service Contact information .....................................................................49
Supply Gas Pressure Adjustment .............................................................51
manifold Gas Pressure Adjustment ..........................................................51
rough Starting, rough Operation ............................................................56
momentary Ignition ...................................................................................56
Not Enough or No Hot Water ...................................................................56
Fault Conditions ........................................................................................57
Alert Conditions ........................................................................................57
resetting Control System Lock Outs ........................................................57
Diagnostic Checks ....................................................................................57
Fault And Alert messages .........................................................................58